UNCLASSIFIED 



Security Classification 



DOCUMENT CONTROL DATA R&D 



Naval Electronics Laboratory Center 

 San Diego, California 92152 



UNCLASSIFIED 



EFFECTS OF DEEP- AND SHALLOW-WATER ENVIRONMENTS ON 

 CONSTRUCTION MATERIALS 



Research and Development Report 



December 1965 - September 196 7 



J. C. Thompson and R. K. Logan 



14 November 1968 



20 



1593 



0. DISTRIBUTION STATEMENT j'jjj^g document Is subjBCt to special export controls and each 

 transmittal to foreign governments or foreign nationals may be made only with 

 prior approval of Naval Electronics Laboratory Center, San Diego, California 92152 



Naval Ship Systems Command 



Test assemblies, each containing 11 specimens of various construction 

 materials, with and without protective coatings, were submerged at depths of 

 10 and 35 fathoms for periods of 18 and 21 months, to determine the fouling and 

 corrosion caused by exposure to these environments. Fouling in the shallower 

 environment was much more severe than in the deeper ocean. Corrosion- 

 resistant steel was found to be more subject to corrosion and fouling than is 

 generally believed. The tri-butyl-tin oxide compounds show promise as protective 

 coatings. Seven test assemblies were left in the deep ocean; they will be 

 periodically retrieved and evaluated over a 10-year period. 



DD /°c,?„1473 (PAGED 



S/N 0101-807-6801 



UNCLASSIFIED 



